CN102022401A - Packing ring and flow control system - Google Patents

Packing ring and flow control system Download PDF

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Publication number
CN102022401A
CN102022401A CN 201010570363 CN201010570363A CN102022401A CN 102022401 A CN102022401 A CN 102022401A CN 201010570363 CN201010570363 CN 201010570363 CN 201010570363 A CN201010570363 A CN 201010570363A CN 102022401 A CN102022401 A CN 102022401A
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China
Prior art keywords
packing ring
control system
main passage
flow control
flow
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CN 201010570363
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Chinese (zh)
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CN102022401B (en
Inventor
李凌峰
杨晨光
魏欣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Sevenstar Electronics Co Ltd
Beijing Sevenstar Huachuang Electronics Co Ltd
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Beijing Sevenstar Electronics Co Ltd
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Priority to CN 201010570363 priority Critical patent/CN102022401B/en
Publication of CN102022401A publication Critical patent/CN102022401A/en
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Publication of CN102022401B publication Critical patent/CN102022401B/en
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Abstract

The invention discloses a packing ring and a flow control system. The packing ring comprises a stepped cylinder consisting of a large cylinder and a small cylinder; an axial through hole is formed in the stepped cylinder; and a cross groove is cut at the outer end of the large cylinder axially. The flow control system comprises a main channel; a flow divider is arranged in the main channel; a valve seat is arranged at the rear end of the main channel; the large cylinder of the packing ring is arranged in the main channel; and the small cylinder is arranged in a channel of the valve seat. The packing ring is simple in structure and convenient to use, and can effectively reduce gas agitation.

Description

Packing ring and flow control system
Technical field
The present invention relates to a kind of flow control system, relate in particular to a kind of packing ring and flow control system.
Background technique
Flow control system is made up of flowmeter, controller, not only has the function of flowmeter, can also control fluid flow automatically, and promptly the user can carry out flow set as required, automatically with constant flow on setting value.Flowmeter is made up of parts such as shunt passage, flow transducer and amplification circuits, on the basis of flowmeter, adds ratio adjusting valve and the PID control circuit has just constituted flow control system.
Flow control system of the prior art comprises measuring apparatus and control system.As shown in Figure 1, measuring apparatus comprises the main passage, is provided with shunt 2 in the main passage and is provided with split-flow opening, and split-flow opening is provided with sensor 5, and sensor 5 inputs to control unit with detected flux signal.By measuring the flow in the split-flow opening, control unit converses total flow, and the result sends control signal to control valve according to conversion, the aperture size of control valve port 6, and then the size of control flow rate.
The structure of main passage comprises two parts of base of channel body 1 and control valve, treat that two-part have assembled respectively after, connect by screw, middle surface of contact is with 3 sealings of O shape circle.
Shunt 2 is cylindric, and shunt comprises shunt seat, ram's horns, and the shunt seat is a ring, and periphery has screw thread.Shunt is fixed in the main passage by the outside thread of shunt seat, the import of shunt communicates with the import of main passage split-flow opening, the outlet of shunt communicates with the outlet of main passage split-flow opening, there is the sealing of O circle the shunt rear end, the fluid of guarantee measuring can only pass through from ram's horns and sensor capillary tube, and the ratio of fluid flow that has guaranteed to flow through the fluid of shunt and flows through sensor like this is accurate.Most of fluid flows through by main passage and shunt, and another part fluid flows through by split-flow opening.Described split-flow opening is provided with sensor, and sensor is connected with control unit, and the flux signal in the detected split-flow opening is inputed to control unit.Control unit is converted into total fluid flow according to the fluid flow ratio in shunt and the split-flow opening with the fluid flow in the split-flow opening.
After the assembling of main passage of the prior art, in the outlet end of shunt and main passage split-flow opening and the main passage between the valve port, there is a cavity 7, this cavity 7 was full of fluid before valve is not opened, when the moment that valve is opened, because the fluid in sensor, shunt and the cavity flows out from valve port simultaneously, can produce bigger disturbance like this, have a strong impact on the degree of accuracy and the stability of mass flow controller.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structurely, easy to use, and can effectively suppress the packing ring and the flow control system of flow control system flow disturbance phenomenon.
The objective of the invention is to be achieved through the following technical solutions:
Packing ring of the present invention comprises the stepped cylindrical body that is made of large cylinder and small cylinder, is provided with axial hole in the described stepped cylindrical body, and cross recess is axially cut in the outer end of described large cylinder.
Flow control system of the present invention comprises the main passage, is provided with shunt in the described main passage, valve seat is equipped with in the rear end of described main passage, also comprise above-mentioned packing ring, the large cylinder of described packing ring installs in the described main passage, and the small cylinder of described packing ring installs in the passage of described valve seat.
As seen from the above technical solution provided by the invention, packing ring of the present invention and flow control system because packing ring is simple in structure, easy to use, and can effectively reduce the gas disturbing phenomenon.
Description of drawings
Fig. 1 is a flow control system structural representation of the prior art;
Fig. 2 is the perspective view of packing ring of the present invention;
Fig. 3 is the sectional structure schematic representation of packing ring of the present invention;
Fig. 4 is a flow control system structural representation of the present invention;
The flow disturbance oscillogram of Fig. 5 for not assembling packing ring in the prior art;
Fig. 6 is the flow disturbance oscillogram of assembling packing ring among the present invention.
Embodiment
Packing ring of the present invention, the concrete real mode that it is preferable such as Fig. 2, shown in Figure 3, comprise the stepped cylindrical body that is made of large cylinder 12 and small cylinder 14, be provided with axial hole 15 in the described stepped cylindrical body, cross recess 11 is axially cut in the outer end of described large cylinder 12.
Described packing ring adopts Erosion-Resisting Non-metallic Materials, and as polytetrafluoroethylmaterial material, the stepped end of described large cylinder 12 is provided with circular groove 13, makes this stepped end be turbination.
Flow control system of the present invention, its preferable concrete real mode as shown in Figure 4, comprise the main passage, be provided with shunt 2 in the described main passage, valve seat 4 is equipped with in the rear end of described main passage, also comprise above-mentioned packing ring 8, the large cylinder of described packing ring 8 installs in the described main passage, and the small cylinder of described packing ring 8 installs in the passage of described valve seat 4.
The outer end of described large cylinder contacts with described shunt, and stepped end is concordant with the ear end face of described main passage.
Among the present invention, the axial hole diameter in the cylindrical body can be different size, and cylindrical diameter can be equal to or less than the access bore diameter, and is simple in structure, easy to use, and can effectively suppress the flow disturbance phenomenon of flow control system.
Also the present invention will be described in detail in conjunction with the accompanying drawings below by specific embodiment:
As shown in Figure 4, after channel body 1, shunt 2 finished with sensor 5 assemblings, packing ring 8 main passage of packing into is connected with valve seat 4 in the cavity 7 of an end, chooses the packing ring of different size axial hole internal diameter according to the shunt specification.
Packing ring 8 cylinder axis are contacted with shunt 2 to cutting cross recess one end, and the fluid that flows out from sensor flows to valve port by cross recess, the axial hole of packing ring; The big column diameter is identical with the main passage internal orifice dimension, adopt Spielpassung, ladder end face and valve seat contacting point, profile is inverted cone-shaped, intensity is lower like this, when guaranteeing the ladder end face and the valve seat end face closely contacts, do not influence the sealing that channel body is connected with valve seat like this, the small cylinder diameter that stretches into valve seat endoporus section is slightly less than the valve seat diameter of bore.It is full to guarantee that back cavity is filled as much as possible, can residual unnecessary fluid.And then assembling valve seat.
As Fig. 5, shown in Figure 6, be the contrast that flow control system is not assembled packing ring and two kinds of flow disturbance situations of assembling packing ring.As can be seen, the effective suppression fluid disturbing phenomenon of packing ring.Simple in structure, reliable and stable and easily processing, easily install, easy for operation, can effectively improve the performance of flow control system, the degree of accuracy that improves the control fluid flow.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.

Claims (4)

1. a packing ring is characterized in that, comprises the stepped cylindrical body that is made of large cylinder and small cylinder, is provided with axial hole in the described stepped cylindrical body, and cross recess is axially cut in the outer end of described large cylinder.
2. packing ring according to claim 1 is characterized in that, described packing ring adopts Erosion-Resisting Non-metallic Materials, and the stepped end of described large cylinder is provided with circular groove, makes this stepped end be turbination.
3. a flow control system comprises the main passage, and valve seat is equipped with in the rear end of described main passage, it is characterized in that, also comprise claim 1 or 2 described packing rings, the large cylinder of described packing ring installs in the main passage, and the small cylinder of described packing ring installs in the passage of described valve seat.
4. flow control system according to claim 3 is characterized in that, the outer end of described large cylinder contacts with described shunt, and stepped end is concordant with the ear end face of described main passage.
CN 201010570363 2010-11-26 2010-11-26 Packing ring and flow control system Active CN102022401B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010570363 CN102022401B (en) 2010-11-26 2010-11-26 Packing ring and flow control system

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Application Number Priority Date Filing Date Title
CN 201010570363 CN102022401B (en) 2010-11-26 2010-11-26 Packing ring and flow control system

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CN102022401A true CN102022401A (en) 2011-04-20
CN102022401B CN102022401B (en) 2013-06-05

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108915904A (en) * 2018-08-23 2018-11-30 中国船舶重工集团公司第七研究所 Gas engine unbalanced fuel gas injection valve
CN110375819A (en) * 2019-07-24 2019-10-25 北京七星华创流量计有限公司 Part flow arrangement and mass flow controller

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2627644A1 (en) * 1975-06-23 1977-01-13 Itt Ind Gmbh Deutsche CENTRIFUGAL PUMP WITH LATERAL DIFFUSION CHAMBER
DE8813050U1 (en) * 1988-10-17 1988-12-01 Schulz + Rackow Gastechnik Gmbh, 3554 Gladenbach, De
FR2817939A1 (en) * 2000-12-12 2002-06-14 Kosan Teknova As AUTOMATIC VALVE FOR LPG CYLINDER WITH A REGULATOR TO BLOCK THE SUPPLY IN THE CASE OF EXCESSIVE FLOW RATE

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2627644A1 (en) * 1975-06-23 1977-01-13 Itt Ind Gmbh Deutsche CENTRIFUGAL PUMP WITH LATERAL DIFFUSION CHAMBER
DE8813050U1 (en) * 1988-10-17 1988-12-01 Schulz + Rackow Gastechnik Gmbh, 3554 Gladenbach, De
FR2817939A1 (en) * 2000-12-12 2002-06-14 Kosan Teknova As AUTOMATIC VALVE FOR LPG CYLINDER WITH A REGULATOR TO BLOCK THE SUPPLY IN THE CASE OF EXCESSIVE FLOW RATE

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108915904A (en) * 2018-08-23 2018-11-30 中国船舶重工集团公司第七研究所 Gas engine unbalanced fuel gas injection valve
CN110375819A (en) * 2019-07-24 2019-10-25 北京七星华创流量计有限公司 Part flow arrangement and mass flow controller
CN110375819B (en) * 2019-07-24 2021-01-15 北京七星华创流量计有限公司 Flow dividing device and mass flow controller

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